PSYC 210 EXAM ACTUAL TEST QUESTIONS
AND CORRECT ANSWERS
◉ Which of these scenarios is a good candidate for a factorial
ANOVA?
a. We want to see if age and height affect weight
b. We want to see if amount of light affects how high plants grow
c. We want to see whether type of mattress and type of pillow
influence quality of sleep
d. We want to see if chapstick sales are affected by flavor of
chapstick
Answer: c. We want to see whether type of mattress and type of
pillow influence quality of sleep
Explanation
The only example with 2 or more predictor variables that are both
nominal and one outcome is the third answer here.
◉ I test pen type (ball point vs. ink) and pen color (blue and yellow)
on legibility of writing. After conducting my factorial ANOVA, I find
, that there is an interaction between pen type and pen color! Which
of the following options gives us an explanation of an interaction
effect (instead of a main effect)?
Yellow ball point pens and yellow ink pens are harder to read than
blue pens of each type.
Yellow ink pens are much easier to read than yellow ball point pens,
but blue pens of each type are pretty much the same as each other.
Ball point pens are easier to read than ink pens.
Blue ball point pens are easiest to read.
Answer: Yellow ink pens are much easier to read than yellow ball
point pens, but blue pens of each type are pretty much the same as
each other.
Explanation
This is tricky one! Answers 1 and 3 are examples of main effects. The
first says that yellow pens are worse than blue pens, the third says
that ball points are better than ink pens. The final option is
automatically true if the other two things are true, and it gives us no
information about how these two variables relate to one another.
The second answer, though, tells us about some differences in how
AND CORRECT ANSWERS
◉ Which of these scenarios is a good candidate for a factorial
ANOVA?
a. We want to see if age and height affect weight
b. We want to see if amount of light affects how high plants grow
c. We want to see whether type of mattress and type of pillow
influence quality of sleep
d. We want to see if chapstick sales are affected by flavor of
chapstick
Answer: c. We want to see whether type of mattress and type of
pillow influence quality of sleep
Explanation
The only example with 2 or more predictor variables that are both
nominal and one outcome is the third answer here.
◉ I test pen type (ball point vs. ink) and pen color (blue and yellow)
on legibility of writing. After conducting my factorial ANOVA, I find
, that there is an interaction between pen type and pen color! Which
of the following options gives us an explanation of an interaction
effect (instead of a main effect)?
Yellow ball point pens and yellow ink pens are harder to read than
blue pens of each type.
Yellow ink pens are much easier to read than yellow ball point pens,
but blue pens of each type are pretty much the same as each other.
Ball point pens are easier to read than ink pens.
Blue ball point pens are easiest to read.
Answer: Yellow ink pens are much easier to read than yellow ball
point pens, but blue pens of each type are pretty much the same as
each other.
Explanation
This is tricky one! Answers 1 and 3 are examples of main effects. The
first says that yellow pens are worse than blue pens, the third says
that ball points are better than ink pens. The final option is
automatically true if the other two things are true, and it gives us no
information about how these two variables relate to one another.
The second answer, though, tells us about some differences in how
